One of the most beloved actresses of the 1990s is sharing a harrowing health update in 2024. Actress Danielle Fishel, perhaps best known for portraying Topanga Lawrence in the smash-hit 1990s sitcom “Boy Meets World,” recently announced that she has a form of breast cancer. Speaking on the Sunday episode of “Pod Meets World” — a podcast Fishel co-hosts with fellow “Boy Meets World” alum Rider Strong and Will Friedle — the actress opened up about the “stage zero” cancer. “So I would like to share something with our listeners,” Fishel began right out of the gate, “something that Rider and Will…